{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "75740",
    "entityType": "User",
    "nonce": "0x504717fa79b3c46adc6fb65521692aec1195d22ef7f22f686b454f28b99e2b30",
    "signature": "0x9d85b7a70cfee6924c0e7d3dd1d083b0ebbd4cd431f5b59cd9cdbafc3f8a3d892cd4c4ae084d7c6af22c30f8d2acb0774ac696b935892bc919e620f3ece4cb751b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}